  <div id="top-nav">
      <ul>
        <li <?php if(strtolower($controller)=="pages" ) echo 'class="current"';?>>
          <a href="<?php echo $this->Html->url('/pages/admin_index');?>">
            <b>Trang chủ</b>
          </a>
        </li>
        <li class="nav-divider"></li>
        <li <?php if(strtolower($controller)=="benhhais" ) echo 'class="current"';?>>
          <a href="<?php echo $this->Html->url('/benhhais/admin_index');?>">
            <b>Bệnh hại</b>
          </a>
        </li>
        <li class="nav-divider"></li>
        <li <?php if(strtolower($controller)=="trieuchungs" ) echo 'class="current"';?>>
           <a href="<?php echo $this->Html->url('/trieuchungs/admin_index');?>">
            <b>Triệu chứng</b>
          </a>
        </li>
        <li class="nav-divider"></li>
         <li <?php if(strtolower($controller)=="thuocs" ) echo 'class="current"';?>>
           <a href="<?php echo $this->Html->url('/thuocs/admin_index');?>">
           
            <b>Thuốc chữa</b>
          </a>
        </li>
         <li class="nav-divider"></li>
         <li <?php if(strtolower($controller)=="benhhaitrieuchungs" ) echo 'class="current"';?>>
           <a href="<?php echo $this->Html->url('/benhhaitrieuchungs/admin_index');?>">
           
            <b>Bệnh&Triệu chứng</b>
          </a>
        </li>
        <li class="nav-divider"></li>
        <li <?php if(strtolower($controller)=="users" ) echo 'class="current"';?>>
          <a href="<?php echo $this->Html->url("/users/admin_index");?>">
            <b>User</b>
          </a>
        </li>
      </ul>
    </div>